JP4895332B2 - Pointer type display device - Google Patents

Description

  The present invention relates to a pointer-type display device mounted on a vehicle, for example, and more particularly to a pointer-type display device in which liquid crystal display means is installed on the observer side of a pointer-type display means from an observer.

  As this kind of pointer type display device, for example, the one described in Patent Document 1 below is known. The pointer-type display device described in the patent document includes, for example, a drive source composed of a stepping motor, a pointer that rotates about an axis through the drive source, and a display board that is provided with an index portion such as a scale or a number corresponding to the pointer. A pointer-type display means for indicating the indicator portion with a pointer, and a rotation center region of the pointer and a display plate region positioned around the pointer when viewed from the observer, and the predetermined information according to the input signal A liquid crystal display means provided on the pointer-type display means, and a pointer and a display board (indicator part) so as to visually recognize a display board area including an information display part for displaying and including a free end side area of the pointer and an indicator part; A light source for illuminating, a light source for pointer-type display means that illuminates the pointer and the indicator portion provided on the opposite side of the observer, a liquid crystal display means light source that illuminates the liquid crystal display means, and a liquid crystal display light source And a light guide for guiding the liquid crystal display unit with light.

  Then, the pointer and the indicator portion are transmitted and illuminated by turning on the light source for the pointer type display means, and the light is guided to the liquid crystal display means through the light guide and transmitted and illuminated by turning on the light source of the liquid crystal display means. .

JP 2002-039807 A

  However, the pointer-type display device described in Patent Document 1 requires a dedicated light source for transmitting and illuminating the liquid crystal display means, and thus has a problem that the cost is increased due to an increase in the number of components. In addition, since the pointer-type display device described in Patent Document 1 requires a dedicated light guide, further cost increases and the structure is complicated.

  The present invention has been made in view of this point, and provides a pointer-type display device capable of reducing the cost.

In order to achieve the above object, the present invention includes a drive source, a pointer that rotates about the axis through the drive source, and a display board provided with an indicator portion corresponding to the pointer, and the indicator portion is provided by the indicator. Pointer-type display means for indicating the first pointer area , the first pointer area of the pointer including the rotation center area of the pointer as viewed from the observer, and the first display of the display plate positioned around the first pointer area A second display that includes an information display unit that covers the plate region so as not to be seen through and displays predetermined information according to an input signal, and includes a second pointer region located on the free end side of the pointer and at least the indicator unit Liquid crystal display means provided on the pointer-type display means so that the plate area can be visually recognized, and a light source provided on the opposite side of the pointer and the display plate from the observer to illuminate the pointer and the indicator portion The first guide area And forming said first panel region with light transmissive material and the light-transmitting region, the information display unit and transmitted illumination by the light of the light source extending in the information display unit is transmitted through the translucent region It is characterized by.

  Further, the present invention is characterized in that the first display panel region and the second display panel region are adjacent to each other via a boundary portion where the color or light transmittance changes according to the surface direction.

  According to the present invention, the pointer has an indicator portion made of a light-transmitting material, and the first pointer region is formed by a rotation center region of the indicator portion and a light diffusion member provided in the rotation center region. In addition, the first display panel region is formed of a light-transmissive printing layer.

  The present invention is characterized in that a colored layer is provided at least in the second pointer region.

Further, according to the present invention, an edge portion is provided on the outer peripheral portion of the information display portion as viewed from the observer, and the edge portion covers an end portion located on the opposite side to the free end side of the colored layer. It is characterized by.
According to the present invention, the liquid crystal display means covers the first pointer region and the first display plate region in a non-transparent manner and has the information display unit, the second pointer region, and the second pointer region. And a support member for supporting the liquid crystal panel on the pointer-type display means. It is characterized by comprising.

  ADVANTAGE OF THE INVENTION According to this invention, the pointer type | mold display apparatus which can achieve an initial objective and can achieve a cost reduction can be provided.

  FIG. 1 and FIG. 2 show a first embodiment of the present invention in which a pointer type display device according to the present invention is applied to, for example, a meter for an automobile. FIG. 1 is a front view of the pointer type display device, and FIG. It is AA sectional drawing of FIG.

  1 and 2, the pointer type display device according to the present embodiment includes a first case body 1, a second case body 2, a pointer type display means 3, and a liquid crystal display means 4. .

  The first case body 1 is made of a synthetic resin part that opens to the viewer side, and stores the pointer-type display means 3 therein.

  The second case body 2 is made of a synthetic resin part disposed on the opening side of the first case body 1, and functions as a decorative frame body that covers a required area on the outer periphery of the pointer-type display means 3. It has a function as a support for supporting the liquid crystal display means 4 on the observer side of the means 3.

  The pointer-type display unit 3 includes a circuit board 31, a light source 32, a drive source 33, a pointer 34, a display plate 35, and a light guide plate 36.

  The circuit board 31 is made of a well-known hard circuit board. A circuit pattern (not shown) is formed on the surface on the observer side, and a light source 32 and a drive source 33 are mounted on the circuit pattern.

  The light source 32 is made of, for example, a light emitting diode, and a plurality of light sources 32 are arranged around the drive source 33.

  The drive source 33 is composed of, for example, a stepping motor, and a pointer 34 is connected to a drive shaft 331 protruding from the motor body, and the drive shaft 331 rotates according to a measurement amount, whereby an instruction on the display board 35 by the pointer 34 is performed. Is possible.

  The pointer 34 includes an instruction unit 341 that extends along the plate surface of the display plate 35 and a transmission member (light diffusion member) 342 that is attached to the instruction unit 341.

  The instruction unit 341 is made of a light-transmitting synthetic resin, and the rotation center region RA is connected to the drive shaft 331, and a reflection unit 343 that reflects light from the light guide plate 36 in the distal direction is formed.

  In this case, a colored layer 344 made of, for example, a hot stamp layer is formed on the surface of the instruction unit 341 opposite to the observer, and the instruction unit 341 is configured to be visually recognized with a predetermined color. ing.

  Further, the pointer 34 includes a rotation center area RA, a partial area of the instruction section 341 connected to the rotation center area RA, and a transmission member (light diffusion member) 342. The first pointer area (translucent area) PA1 that is covered by the observer and is not visually recognized by the observer, and extends from the tip of the instruction section 341 toward the rotation center area RA, is not covered by the information display section, and from the observer The second pointer area PA2 is visually recognized, and both the first and second pointer areas PA1 and PA2 are configured to transmit light toward the viewer. Furthermore, the colored layer 344 has a configuration in which an end located on the side opposite to the free end side is covered with an edge portion, which will be described later, of the information display unit so that it cannot be seen by an observer.

  The transmissive member 342 is formed in a cup shape that covers the observer-side surface and the side peripheral portion of the rotation center RC using a light-transmitting or semi-transmitting synthetic resin material, and is formed on the observer-side surface. Is provided with a light diffusing portion 345 having a fine concavo-convex shape in order to diffuse light and transmit it to the viewer side. The light diffusing unit 345 is used for the purpose of eliminating the unevenness of light transmitted to the observer side. However, if the light diffusing unit 345 is not sufficient, it is used for dimming printing or a separate dimming member. May be provided.

  The display panel 35 includes a substrate 351 made of a synthetic resin having translucency, and a first layer 352 and a second layer 353 provided on the synthetic resin substrate 351.

  The first layer 352 is positioned around the first pointer area PA1 of the pointer 34 by using, for example, a light-transmitting ink such as white, and is covered with the information display unit. (Area) Printed and formed in a range that falls within DA1 and in the index portion 354 locations to be indicated by the pointer 34.

  The second layer 353 is, for example, using black light-shielding ink, and is located in a region excluding the first display board area DA1 and the portion to be the indicator portion 354, that is, around the first display board area DA1. It is printed on the second display panel area DA2 that is not covered by the information display part and is visually recognized by the observer and is the background of the indicator part 354.

  Further, as shown in the partially enlarged view in FIG. 2, the color and light transmittance of the boundary portion BD between the first and second layers 352 and 353 gradually (smoothly) change in accordance with the surface direction. It is formed as a gradation printing part.

  That is, in the boundary portion BD, a second layer 353 composed of a dot-like dot print layer is formed on the first layer 352. At this time, the dot print layer is separated from the second display board area DA2. Accordingly, the density and the light transmittance gradually change according to the surface direction. Note that the method for forming the gradation printing portion is not limited to this, and any method may be used as long as the color or light transmittance gradually changes in accordance with the surface direction, except for the first and second layers 352 and 353. Other layers may be used.

  The light guide plate 36 is made of a light-transmitting synthetic resin material, introduces light from the light source 32, guides it to the pointer 34 and the display plate 35, and illuminates them. Specifically, the light from the light source 32 is supplied to the rotation center region RA of the pointer 34 by the light guide plate 36. A part of the supplied light is reflected through the reflecting part 343 to make the indicating part 341 shine with the color of the colored layer 344, and the other part of the supplied light is a first pointer region (a transparent region). (Translucent area) Transmits or diffuses through PA1, and illuminates an information display section (described later) of the liquid crystal display means 4 from behind. On the other hand, the light guided to the display board 35 is transmitted through the indicator portion 354 to illuminate it brightly, and is transmitted or diffused and transmitted through the first display board area DA1 which is a light-transmitting area. An information display unit (to be described later) of the means 4 is illuminated from behind.

  The liquid crystal display means 4 includes a pair of glass substrates 41 and 42 in which liquid crystal is sealed, a transflective member 43, an edge 44, a first polarizing plate 45, and a second polarizing plate 46. Depending on the input signal, for example, predetermined information including vehicle speed is displayed.

  The glass substrates 41 and 42 are held by the second case body 2 so as to cover the entire viewing area on the observer side of the pointer type display means 3.

  The transflective member 43 is a glass substrate 42 on the side opposite to the observer side so as to include a place where the predetermined information is displayed on the glass substrates 41 and 42 by a liquid crystal display (segment format in the present embodiment). An information display unit 47 is mounted on a surface facing the pointer type display unit 3 and displays the predetermined information together with the liquid crystal display portion.

  In this case, the transflective member 43 that defines the information display portion 47 is a portion of the first pointer region PA1, the first display plate region DA1, the boundary portion BD, and the second display plate region DA2 that is continuous with the boundary portion BD. The area is covered continuously and invisible.

  That is, the transflective member 43 looks, for example, silver-colored by reflecting external light and natural light incident from the viewer side to the viewer side, and the three pointer-type display means covered by this are pointers by the reflection. Since the light incident on the expression display means 3 is blocked, it cannot be seen through. In addition, since the display format of the liquid crystal display means 4 according to the present embodiment is a positive display type in which the segment is opaque and the background is transparent, for example, when the light source 32 is turned off and the external light is incident. The predetermined information is displayed on the liquid crystal display through the black segment in the silver background by the transflective member 43.

  As described above, the transflective member 43 has a function of reflecting the external light and the like and transmitting the light from the light source 32 to the viewer side. That is, when the light source 32 is turned on, the light is guided to the pointer 34 and the display plate 35 through the light guide plate 36, passes through the first pointer region PA 1 and the first display plate region DA 1, and enters the transflective member 43. It reaches. Thus, the light that reaches the transflective member 43 is transmitted through the transflective member 43 to illuminate the information display unit 47. As a result, the predetermined information is displayed on the liquid crystal through the black segment in the silver background by the transmitted light from the transflective member 43.

  The edge portion 44 is composed of a light shielding layer formed by printing or the like on the surface of the glass substrate 42 facing the pointer-type display means 3, and transflective along the outer edge of the information display portion 47 (semi-transmissive reflection member 43). An end portion that partially overlaps the member 43 and is located on the opposite side of the free end side of the colored layer 344 of the pointer 34 (the indicator portion 341 portion where the colored layer 344 is formed and the indicator portion 341 portion that is not covered) Is provided so as to cover the entire rotation region of the pointer 34.

  The first and second polarizing plates 45 and 46 are both linear polarizing plates, and enable the liquid crystal display of the predetermined information by the polarization action. In the present embodiment, the second polarizing plate 46 is formed in the same size as the transflective member 43 so as not to cover the second pointer area PA1 and the second display panel area DA1.

  As described above, according to the present embodiment, the driving source 10, the pointer 34 that rotates around the axis through the driving source 10, and the display plate 35 provided with the indicator portion 354 corresponding to the pointer 34 are provided. The pointer-type display means 3 for indicating the indicator portion 354 by the pointer 34, the first pointer region PA1 including the rotation center region RA of the pointer 34 when viewed from the observer, and the display positioned around the first pointer region PA1 A second pointer area PA2 that covers the first display board area DA1 of the board 35 so as not to be transparent and displays predetermined information in accordance with an input signal; The liquid crystal display means 4 provided on the pointer-type display means 3 so that the second display board DA2 region including at least the indicator portion 354 can be visually recognized, and the pointer 34 and the display board 35 are provided on the opposite side of the observer. Guidelines 4 and the light source 32 that illuminates the indicator portion 354, the first pointer area PA1 and the first display panel area DA1 are formed of a light-transmitting material to form a light-transmitting area, and the light-transmitting area is transmitted. By transmitting and illuminating the information display unit 47 with the light of the light source 32 reaching the information display unit 47, a dedicated light source and a light guide plate are not required for transmitting and illuminating the liquid crystal display means 4, so that the structure is simple. And cost reduction can be achieved.

  In the present embodiment, the first display panel area DA1 and the second display panel area DA2 are adjacent to each other via a boundary portion BD in which the color and light transmittance change according to the surface direction. In this case, even when the boundary portion BD is visible, the boundary portion BD is visible with gradation, so that the switching between DA1 and DA2 in both areas can be made inconspicuous.

  In the present embodiment, the pointer 34 has an instruction portion 341 made of a translucent material, and the rotation center region RA of the instruction portion 341 and a transmission member (light diffusion member) 342 provided in the rotation center region RA. It is advantageous if the first pointer area PA1 is formed and the first display panel area DA1 is formed of a light-transmissive printing layer.

  In the present embodiment, the colored layer 344 is provided in the second pointer area PA2 and the colored layer 344 is not provided in the first pointer area PA1, so that the color of the colored layer 344 is changed when the information display unit 47 is illuminated. It is possible to prevent the information display unit 47 from becoming turbid.

  In the present embodiment, an edge 44 is provided on the outer periphery of the information display unit 47 as viewed from the observer, and the edge 44 covers an end located on the side opposite to the free end of the colored layer 344. Thereby, in the instruction | indication part 341, the boundary of the part in which the colored layer 344 was formed, and the part which does not form this can be made hard to see from a front, and it can prevent impairing a design external appearance.

  In the present embodiment, the glass substrates 41 and 42 of the liquid crystal display means 4 are sized so as to cover substantially the entire surface of the pointer-type display means 3, and an example in which the transflective member 43 is provided only at a location that becomes the information display section 47 is shown. However, the liquid crystal display means 4 may be provided on the observer side of the pointer-type display means 3 by unitizing a liquid crystal cell in which a liquid crystal is sealed between glass substrates in a special case. A part or all of the case or unit may be set so as to allow light transmission so that the liquid crystal cell can be illuminated.

  In the present embodiment, the liquid crystal display means 4 is a positive display and a segment type, but the format is arbitrary.

  In the present embodiment, both the first pointer area PA1 and the first display board area DA1 are translucent areas. However, only one of the first pointer area PA1 and the first display board area DA1 depends on the size and position of the information display unit 47 to be illuminated. May be a translucent region.

  In the present invention, it is sufficient that the liquid crystal display means 4 can be transmitted and illuminated by at least one of the light source for the pointer or the display plate, and a light guide member may be interposed between the light source 32 and the liquid crystal display means 4.

  FIG. 3 is a cross-sectional view showing a second embodiment of the present invention. This embodiment is different from the first embodiment in that the liquid crystal display means 4 is a pointer-type display in the first embodiment. In the present embodiment, the liquid crystal display unit 4 covers a predetermined area of the pointer type display unit 3 and the liquid crystal panel. A point constituted by a support member 402 that supports 401 on the pointer type display means 3, a point that the first turning member 5 that supports the support member 402 on the pointer type display means 3 is adopted, The second facing member 6 that covers the required part of the liquid crystal display means 4 is employed, and the transparent cover 7 that covers the front of the liquid crystal display means 4 and the second facing member 6 is employed. The rest is the same as in the first embodiment. Since the first and second turning members 5 and 6 and the transparent cover 7 are well known, the liquid crystal panel 401 and the support member 402 constituting the liquid crystal display means 4 will be described below.

  The liquid crystal panel 401 has the same basic structure as that of the above embodiment, but the panel size is smaller than that, covers the first pointer area PA1 and the first display board area DA1 in an invisible manner, and displays the information display section. 47.

  The support member 402 is made of, for example, a transparent synthetic resin, and covers the second pointer area PA2 and the second display board area PA2 so as to be transparent, and the liquid crystal panel 401 is continuously provided from the cover 403. The liquid crystal panel 401 is supported on the pointer-type display means 3 and the light transmitted through the light-transmitting area composed of the first pointer area PA1 and the first display plate area DA1 is further transmitted to the liquid crystal panel 401 side. And a support portion 404 to be used. In addition, a peripheral wall-shaped position restricting portion 405 that restricts the position of the liquid crystal panel 401 is continuously formed on the support portion 404 to restrict the position of the liquid crystal panel 401.

  The support member 402 configured as described above is supported on the pointer-type display unit 3 through the first look-up member 5, and allows the second pointer region PA2 and the second display plate region PA2 to be seen through the cover portion 403. Further, the light transmitted through the light transmitting region is further transmitted to the liquid crystal panel 401 side through the support portion 404, and the liquid crystal panel 401 is transmitted and illuminated.

  As described above, in the present embodiment, the liquid crystal display means 4 covers the first pointer area PA1 and the first display plate area DA1 in a non-transparent manner and has the information display section 47, and the second pointer. The area PA2 and the second display panel area can be seen through DA2, and the liquid crystal panel 401 is formed on the pointer-type display means 3 and is made of a translucent material that further transmits the light transmitted through the light transmitting area to the liquid crystal panel 401 side. By being configured with the supporting member 402 to be supported, the pointer-type display similar to that of the first embodiment can be performed while reducing the size of the liquid crystal panel 401, and cost reduction can be achieved.

1 is a front view of a display device according to a first embodiment of the present invention. AA sectional drawing of FIG. The front view of the display apparatus by the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st case body 2 2nd case body 3 Pointer type | mold display means 4 Liquid crystal display means 5 1st facing member 6 2nd facing member 7 Transparent cover 7
31 circuit board 32 light source 33 drive source 34 pointer 35 display plate 36 light guide plate 41, 42 glass substrate 43 transflective member 44 edge 45 first polarizing plate 46 second polarizing plate 47 information display unit 331 drive shaft 342 transmission Member (light diffusion member)
341 Instructing unit 343 Reflecting unit 344 Colored layer 345 Light diffusion unit 351 Substrate 352 First layer 353 Second layer 354 Index unit 401 Liquid crystal panel 402 Support member 403 Covering unit 404 Support unit 405 Position regulating unit BD Boundary unit DA1 first Display board area DA2 Second display board area PA1 First pointer area (translucent area)
PA2 Second pointer area RA Center of rotation area

Claims (6)

A driving source, a pointer that rotates about the axis through the driving source, and a display plate provided with an index portion corresponding to the pointer, and a pointer-type display unit that indicates the index portion by the pointer;
The first pointer region of the pointer including the rotation center region of the pointer as viewed from the observer and the first display plate region of the display panel located around the first pointer region are covered and input is not possible. An information display unit that displays predetermined information in accordance with a signal; and the pointer so that a second pointer region located on a free end side of the pointer and a second display plate region including at least the indicator portion can be visually recognized. Liquid crystal display means provided on the expression display means;
A light source for illuminating the pointer and the indicator portion provided on the opposite side of the pointer and the observer of the display plate,
The first pointer region and the first display plate region are formed of a light-transmitting material to form a light-transmitting region, and the information is transmitted by the light from the light source that passes through the light-transmitting region and reaches the information display unit. A pointer-type display device, wherein the display unit is transmitted and illuminated. 2. The pointer-type display device according to claim 1, wherein the first display panel area and the second display panel area are adjacent to each other via a boundary portion where the color or light transmittance changes according to the surface direction. The pointer has an indicator portion made of a translucent material, and the first pointer region is formed by a rotation center region of the indicator portion and a light diffusion member provided in the rotation center region. 2. The pointer-type display device according to claim 1, wherein the display plate area is formed of a light-transmitting printing layer. The pointer-type display device according to claim 1, wherein a colored layer is provided at least in the second pointer region. An edge portion is provided on an outer peripheral portion of the information display portion as viewed from the observer, and this edge portion covers an end portion of the colored layer located on the opposite side to the free end side. Item 4. The pointer type display device according to Item 4 . The liquid crystal display means covers the first pointer region and the first display plate region in a non-transparent manner and has the information display unit; the second pointer region and the second display plate region And a support member for supporting the liquid crystal panel on the pointer-type display means, which is made of a translucent material that allows the light transmitted through the light-transmitting region to further pass to the liquid crystal panel side. The pointer-type display device according to claim 1.

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